APP Productivity and Modifier Resources
Last reviewed: June 2026
Practical educational references for PAs, NPs, CNSs, residents, surgeons, and coders using CPT codes and wRVUs for case review. These guides do not guarantee reimbursement or compensation.
Estimated APP Productivity is not the same as compensation, reimbursement, or guaranteed employer wRVU credit. Actual attribution depends on payer rules, documentation, modifier acceptance, scope of practice, supervision requirements, and employer compensation policy.
Modifier AS Guide
Modifier AS identifies a Physician Assistant, Nurse Practitioner, or Clinical Nurse Specialist assistant at surgery. Use depends on the procedure's assistant-at-surgery eligibility, medical necessity, payer policy, documentation, and scope-of-practice rules.
Assistant-at-Surgery Guide
Assistant-at-surgery services may involve modifier 80, 81, 82, or AS depending on who performed the assistant service and the payer's rules. APP Mode uses a 13.6% educational equivalent for surgical codes, not a payment promise.
Split/Shared Visit Guide
Split/shared E/M attribution depends on facility setting rules, same-group participation, substantive portion, medical record documentation, signature/date requirements, claim modifiers, and current CMS/payer policy.
APP Productivity Guide
Estimated APP Productivity in FreeCPTCodeFinder is a presentation-layer educational estimate. It displays physician wRVUs and a separate APP estimate so users can understand the relationship without changing source physician calculations.
Estimated APP Productivity is not the same as compensation, reimbursement, or guaranteed employer wRVU credit. Actual attribution depends on payer rules, documentation, modifier acceptance, scope of practice, supervision requirements, and employer compensation policy.
Tooltip Library
Physician Assistant, Nurse Practitioner, or Clinical Nurse Specialist assistant at surgery.
Assistant surgeon.
Minimum assistant surgeon.
Assistant surgeon when qualified resident unavailable.
Productivity attribution depends on payer requirements, documentation, and employer policy.